Hauser



UNITED STATES PATENT OFFICE.

ERNST OSCAR FANKHAUSER, OF BURGDORF, SWITZERLAND.

MORDANT.

SIECIFICATION forming part of Letters Patent No. 437,295, datedSeptember 30, 1890.

Application filed May 8, 1890. Serial No. 351,088. (No specimens.)Patented in France November 22, 1888, No.194,278; in Belgium November28, 1888, No. 84,118; in Italy November 30,1888,No. 24,501; in EnglandDecember 21,1888,N0.18,717; in Spain January 25, 1889, No. 8,945, and inAustria-Hungary December 20, 1889, No. 47,104.

To all whom it may concern.-

Be it known that I, ERNST OSCAR FANK- HAUSER, a citizen of Switzerland,residing at Burgdorf, in the canton of Bern, Switzerland, have inventedcertain new and useful Improvements in Mordants for Cotton and otherThreads and Fabrics, (for which I have obtained patents in the followingcountries: Italy, No. 24,501, dated November 30, 1888; France, No.194,278, dated November 22, 1888; Spain, No. 8,945, dated January 25,1889; Great Britain, No. 18,717, dated December 21, 1888; Belgium, No.84,118, dated November 28, 1888, and Austria Hungary, No. 47,104, datedDecember 20, 1889,) of which the following is a specification. v

This invention relates to animproved mordant tobe used in the process ofdyeing yarn or thread or fabrics of cotton and any other textilematerial.

The improved mordant of my invention is applied directly to the cottonyarn or fabrics to be dyed without any previous boiling of the cotton orcotton thread or yarn or fabrics under treatment. The improved mordantof my invention may as well be employed in treating thread or yarn orfabrics of mixed material, such as cotton and silk, or Wool and cotton,which fabrics will become very soft and susceptible for the dyeing to beapplied.

The process of preparing the new and improved mordant of my inventionconsists in first preparinga mixture of one hundred kilograms ofcastor-oil and twenty kilograms of sulphuric acid. The oil and the acidare slowly stirred to form an intimate mixture, which remains in a stateof rest for several days,

upon which twenty-three kilograms of sodalye of 30 Baumare added insmall portions. The mixture is then heated to Reau mur, and an additionof twentykilograms of ammonia is made to the mass. Separately from themixture aforedescribed I prepare in another vessel a solution of sixkilograms best white soap in twenty-five liters of water, and to thissolution I add a solution of four kilograms of extract of sumac in tenliters of water. This combined solution is then added to the firstmixture, before described, while still in a heated state.

By the application of this improved mordant the boiling of the yarn orfabrics before being mordanted is entirely dispensed with, and aconsiderable economy of fuel, time, and Wages is obtained. The thread oryarn or fabrics mordanted by the improved mordant is obtained soft andsupple and highly susceptible for the dye. The dye-fluid is readilyimbibed by the mordanted yarn or fabrics and the colors are fixed in asuperior manner, receiving shades of improved intensity.

I claim as my invention A mordant for cotton or mixed thread, yarn, orfabrics, composed, substantially as described, of a mixture ofcastor-oil, sulphuric acid, soda-lye, ammonia, white soap, and extractof sumac, as set forth.

In testimony whereof I hereunto sign my name, in the presence of twosubscribing witnesses, this 19th day of April, 1890.

' ERNST OSCAR FANKHAUSER.

Witnesses:

J OHANN WABER, S. MAUYER.

